SN55LBC176, SN65LBC176, SN65LBC176Q, SN75LBC176

DIFFERENTIAL BUS TRANSCEIVERS

SLLS067G − AUGUST 1990 − REVISED APRIL 2006

5

POST OFFICE BOX 655303

DRIVER SECTION

electrical characteristics over recommended ranges of supply voltage and operating free-air

temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

VIK

Input clamp voltage

II = − 18 mA

−1.5

V

VO

Output voltage

IO = 0

0

6

V

| VOD1 |

Differential output voltage

IO = 0

1.5

6

V

55LBC176,

| VOD2 |

Differential output voltage

RL = 54 Ω,

See Figure 1,

55LBC176,

65LBC176,

1.1

V

| VOD2 |

Differential output voltage

RL = 54 Ω,

See Note 3

See Figure 1,

65LBC176,

65LBC176Q

1.1

V

OD2

See Note 3

75LBC176

1.5

5

V

= − 7 V to 12 V,

See Figure 2,

55LCB176,

65LCB176,

1.1

VOD3

Differential output voltage

Vtest = − 7 V to 12 V,

See Note 3

See Figure 2,

65LCB176,

65LBC176Q

1.1

V

OD3

See Note 3

75LBC176

1.5

5

∆| VOD |

Change in magnitude of differential

output voltage †

−0.2

0.2

V

VOC

Common-mode output voltage

RL = 54 Ω or 100 Ω,

See Figure 1

−1

3

V

∆| VOC |

Change in magnitude of

common-mode output voltage†

RL = 54 Ω or 100 Ω,

See Figure 1

−0.2

0.2

V

IO

Output current

Output disabled,

VO = 12 V

1

mA

IO

Output current

Output disabled,

See Note 4

VO = − 7 V

−0.8

mA

IIH

High-level input current

VI = 2.4 V

−100

µA

IIL

Low-level input current

VI = 0.4 V

−100

µA

VO = − 7 V

−250

IOS

Short-circuit output current

VO = 0

−150

mA

IOS

Short-circuit output current

VO = VCC

250

mA

VO = 12 V

250

Receiver disabled

55LBC176,

65LBC176Q

1.75

ICC

Supply current

VI = 0 or VCC,

Receiver disabled

and driver enabled

65LBC176,

75LBC176

1.5

mA

ICC

Supply current

VI = 0 or VCC,

No load

Receiver and driver

55LBC176,

65LBC176Q

0.25

mA

Receiver and driver

disabled

65LBC176,

75LBC176

0.2

† ∆ | VOD | and ∆ | VOC | are the changes in magnitude of VOD and VOC, respectively, that occur when the input changes from a high level to a

low level.

NOTES:

3. This device meets the VOD requirements of TIA/EIA−485−A above 0°C only.

4. This applies for both power on and off; refer to TIA/EIA−485−A for exact conditions.